[nino]

Nemam ih nazalost, ali i Logitech-ov faq kaze:

Speaker Systems: On speaker systems this informtion can be found on a label that is attached to a component of the speaker system. Please note than more than one PID, P/N, or M/N may appear on a speaker set (e.g. there may be a label on both the control pod and the subwoofer with unique information.) As a general rule the label can be found on one or more of the following locations:

Bottom of the Subwoofer
Back of the Subwoofer
Back of the Control Pod
Back of one of the Satelitte Speakers (Usually the right front)